We have Fein ASGE 648 5.5 Amp 1/2-Inch Capacity Tapper with Product Detail Industrial design for heavy use Capacity in steel 1/2" Head spins counterclockwise until hits material, then spins clockwise while tapping and automatically backs out of hole once pressure is released Self enclosed tapping unit enables efficiency and speed of work Lightweight, only 8.2 lbs . The "Fein ASGE 648 5.5 Amp 1/2-Inch Capacity Tapper" is best product for you. We recommended Fein ASGE 648 5.5 Amp 1/2-Inch Capacity Tapper